You just have to sample a large enough number of environments (please note, environments, not people) and you may find out that "some" != "few" either. In large cities you are very likely to find people on their phones most of the time, but large cities are not all there is.
As for cars, when I lived in a small town in North America I had to buy a car. I was too restricted without one. When I lived in a large European city with good public transportation I did not drive a car in more than 10 years. Cars are enablers (allow you to get quickly from one place to another), but in some places there are alternative enablers, like public transportation. I am expected to use one or the other, so I cannot tell the boss that I will walk to work.
If you don't like the phone example take the example of a trans-Atlantic trip. Will your boss agree for you to spend 5 days one way by ship, and another 5 days on the way back or will she/he tell you to get on a plane ?
The enabler (plane) has shifted the expectation (the length of the trip reduced from 5 days to 8 hours one way)